Modulation and Control of Series/Parallel Module for Ripple-Current Reduction in Star-Configured Split-Battery Applications
Abstract
Split-battery converters based on cascaded H-bridges (CHBs) are gaining popularity due to their excellent physical modularity. During operation, however, the batteries experience substantial current ripple. Conventional ripple-current reduction methods rely on bulky passive components or complicated control. This article presents modulation and common-mode voltage injection methods for cascaded double-H-bridge converters (CHB²). The control methods directly mitigate the source of the ripple current—the fluctuating arm power—by exploiting the parallel interconnection across the CHB² arms. In the lab setup, the proposed solution approximately halves the battery current ripple compared to the CHB counterpart. Finally, this article studies component sizing and limitations of the proposed solution.
Additional Information
© 2020 IEEE. Manuscript received January 5, 2019; revised April 17, 2019, July 8, 2019, September 12, 2019, and December 11, 2019; accepted May 1, 2020. Date of publication May 20, 2020; date of current version July 31, 2020. The preliminary study "Ripple Current Suppression Methods for Star-Configured Modular Multilevel Converters" was presented on 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, 2017. This work was supported in part by the National Science Foundation under Grant 1608929, in part by the North Carolina Biotechnology Center under Grant 2016-CFG-8004, in part by a seed grant from the Duke University Energy Initiative, and in part by Fondecyt Regular under Grant 1201344. Recommended for publication by Associate Editor L. Huber.Additional details
- Eprint ID
- 103535
- DOI
- 10.1109/tpel.2020.2996542
- Resolver ID
- CaltechAUTHORS:20200529-073401559
- ECCS-1608929
- NSF
- 2016-CFG-8004
- North Carolina Biotechnology Center
- Duke University
- 1201344
- Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
- Created
-
2020-05-29Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field